JP2000128508A - Discharge body unit for ozone generation and ozone generating device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To dispense with the simultaneous exchange of a casing at the time of exchanging a discharge body for ozone generation and to effectively suppress the decrease of ozone generation efficiency in an ozone generating device using a creeping discharge type discharge body for ozone generation. SOLUTION: A discharge body unit 10 for ozone generation is formed by sticking a heat transmit plate 14 having higher heat conductivity than that of a ceramic substrate 18 to the surface of an induction electrode 22 side of the discharge body 12 for ozone generation, which has a discharge electrode 20 and an induction electrode 22 stuck to be formed on both surfaces of the ceramic substrate 18. The ozone generating device 50 is formed by housing the discharge body unit 10 for ozone generation in a casing 52. In such a case, the discharge body unit 10 for ozone generation is pressed and fixed to a casing main body 54 by a compression coil spring 64 in a state that the heat transmit plate 14 is brought into surface contact with the heat transmit plate contacting surface 54a of the casing main body 54. As a result, the discharge body unit 10 for ozone generation is closely fixed to and freely detached from the casing 52.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an ozone generation unit and an ozone generation apparatus using a so-called creeping discharge type ozone generation unit.

[0002]

2. Description of the Related Art Ozone has a strong oxidizing power and exhibits excellent functions for sterilization, deodorization, bleaching, etc., and is therefore being used in various fields.

[0003] As one of the ozone generators for artificially generating ozone, a device provided with a surface discharge type ozone generating discharger is known. This creeping discharge type ozone generating discharge body is formed by adhering and forming a discharge electrode and an induction electrode on both surfaces of a dielectric substrate, and applying an AC high voltage between both electrodes to form a discharge electrode. Corona discharge is generated in the vicinity of the space, and thereby the raw material gas supplied to the space near the discharge electrode is ozonized.

In an ozone generator equipped with such an ozone generating discharger, the temperature of the ozone generating discharger tends to rise due to heat generated during corona discharge. Since the generated ozone concentration sharply decreases, it is desired to keep the concentration as low as possible from the viewpoint of suppressing a decrease in ozone generation efficiency.

For this reason, in the conventional ozone generating apparatus, as shown in FIG. 9, the surface of the ozone generating discharge body 110 on the induction electrode 116 side is made to correspond to the inner surface of the casing 120 accommodating the ozone generating discharge body 110. By adhering to the casing 120a, the heat of the ozone generating discharge
It is designed to escape to.

[0006]

However, in the above-mentioned conventional ozone generator, the ozone generating discharger 1 is used.
Since 10 is adhered to casing 120, there are the following problems.

That is, since the discharge electrode 114 of the ozone generating discharger 110 is gradually consumed by continuous use of the ozone generator, the ozone generating discharger 110 is removed at regular intervals.
However, since the ozone generation discharge body 110 is adhered to the casing 120, it is necessary to replace not only the ozone generation discharge body 110 but also the casing 120 at the same time. For this reason, there is a problem that the maintenance cost of the ozone generator becomes very high.

On the other hand, for example, a discharge member 11 for generating ozone is used by using a fixture 122 as shown in FIG.
If the O is mechanically fixed to the casing 120, only the ozone generating discharge body 110 can be replaced.

However, when such a mechanical fixing structure is used, the following problem occurs.

That is, the surface of the induction electrode 116 is generally not a sufficiently smooth surface, and as shown in FIG.
a, a lot of gaps 124 are formed between them.
The induction electrode 116 cannot be brought into close contact with the casing 120. Further, since the gas is interposed in these gaps 124, the heat of the ozone generating discharge body 110 cannot be sufficiently released to the casing 120, and the heat is insufficiently released. There is a problem that the ozone concentration is rapidly reduced.

The present invention has been made in view of such circumstances, and it is not necessary to simultaneously replace the casing when exchanging the ozone generating discharger, and it is possible to effectively reduce the ozone generation efficiency. It is an object of the present invention to provide an ozone generation discharge unit and an ozone generation device that can be suppressed.

[0012]

According to the present invention, the above object is achieved by attaching a predetermined heat transfer plate to a surface of an ozone generating discharge body on the side of an induction electrode to form a unit structure. It is.

In other words, the ozone generating discharge unit according to the present invention comprises an ozone generating discharge element having a discharge electrode and an induction electrode attached to both surfaces of a dielectric substrate. A heat transfer plate fixed to the surface of the ozone generating discharge body on the induction electrode side and having a higher thermal conductivity than the dielectric substrate.

Further, the ozone generator according to the present invention comprises:
As described in claim 5, an ozone generating apparatus including the ozone generating discharge unit and a casing accommodating the ozone generating discharge unit, wherein the ozone generating discharge unit includes: The heat transfer plate is detachably supported by the casing so as to make surface contact with the casing.

A typical example of the above-mentioned "fixation" is adhesion. However, any method that can integrate the ozone generating discharge body and the heat transfer plate so that air does not intervene between them can be used. For example, a method other than bonding may be adopted.

The "heat transfer plate" is not particularly limited as long as it is a plate-like member having a higher thermal conductivity than the dielectric substrate, such as its plate thickness, shape, size, and material. Absent.

The "casing" accommodates the ozone generating discharge unit so as to form an ozone generating space, and has at least a portion in surface contact with the heat transfer plate having higher heat conductivity than the dielectric substrate. The specific configuration is not particularly limited as long as it is made of a material having a specific ratio.

[0018]

As described above, in the ozone generating discharge unit according to the present invention, the heat transfer member having a higher heat conductivity than the dielectric substrate is provided on the surface of the ozone generating discharge member on the induction electrode side. Since the plate is fixed, the heat of the ozone generating discharge body can be released to the heat transfer plate.

Further, the ozone generator according to the present invention comprises:
Since the ozone generating discharge unit is supported so that the heat transfer plate is in surface contact with the casing,
The heat of the ozone generating discharger can be released to the casing via the heat transfer plate. At this time, since the heat transfer plate can easily ensure the smoothness of its surface as compared with the induction electrode, the adhesion between the heat transfer plate and the casing can be sufficiently ensured. Heat can be smoothly transferred from the ozone generating discharge body to the casing. Moreover, since the weight of the ozone generating discharge unit is larger than that of the ozone generating single discharge unit by the amount of the heat transfer plate, the self-weight can be used to enhance the adhesion to the casing.

Further, since the discharge unit for ozone generation is detachably supported by the casing, when it is necessary to replace the discharge unit for ozone generation, the discharge unit for ozone generation is removed from the casing. Only the ozone generating discharge unit can be replaced.

Therefore, according to the present invention, it is not necessary to simultaneously replace the casing when replacing the ozone generating discharger, and it is possible to effectively suppress a decrease in ozone generation efficiency.

In particular, the above-mentioned ozone generating discharge unit has a heat transfer plate fixed to the ozone generating discharge unit. However, since this heat transfer plate is extremely inexpensive as compared with the casing, it is the same as the conventional one. The maintenance cost of the ozone generator can be greatly reduced as compared with the case where the casing is replaced simultaneously.

In general, in a discharge element for generating ozone, there is a difference in the coefficient of thermal expansion between the dielectric substrate and the discharge electrode and the induction electrode. Since the adhesion formation pattern is different, bending deformation tends to occur at high temperatures. For this reason, when the above-mentioned mechanical fixing structure is used, it is difficult to maintain the ozone generating discharge body in close contact with the casing. In particular, depending on the material selection of each component of the ozone generating discharge element and the adhesion formation pattern of each electrode, it is extremely difficult to maintain the close contact state. In such a case, since the heat radiation of the ozone generating discharger is reduced, there is a problem that the ozone generation efficiency is also reduced.

In this regard, in the ozone generating discharge unit according to the present invention, since the heat transfer plate is fixed to the surface of the ozone generating discharge member on the induction electrode side, the ozone generating discharge member is bent and deformed by heat. This can be prevented by the rigidity of the heat transfer plate.

In this case, the rigidity of the heat transfer plate can be sufficiently increased by setting the thickness of the heat transfer plate to a value larger than the thickness of the dielectric substrate. Therefore, it is possible to effectively prevent the deformation of the ozone generating discharge body due to the heat. At this time, if the plate thickness of the heat transfer plate is set to be at least twice, preferably at least three times the plate thickness of the dielectric substrate, the weight of the ozone generating discharge unit is increased to some extent, and the thickness of the ozone generating discharge unit is increased. The adhesiveness can be further improved, and the workability of the ozone generation discharger unit can be improved by increasing the plate thickness of the entire discharger unit.

Further, if the "heat transfer plate" having the same outer shape as the dielectric substrate is used as described in claim 3, the heat transfer plate is provided. Effect (ie, heat dissipation effect and bending deformation prevention effect)
, The ozone generating discharge unit can be made compact.

According to a sixth aspect of the present invention, the casing includes a casing main body having a heat transfer plate contact surface capable of making surface contact with the heat transfer plate, and a cover attached to the casing main body. With this configuration, replacement of the ozone generating discharge unit can be easily performed by opening and closing the cover.

At this time, if a plurality of heat radiating fins are formed on the outer surface of the casing main body, the heat transmitted to the casing main body is efficiently radiated to the external space. be able to.

In the above structure, the heat transfer plate is formed of a conductive member, and the heat transfer plate is fixed to the discharger for ozone generation using a conductive adhesive. By performing the bonding, the heat transfer plate can be used as a terminal on the induction electrode side.

In this case, if the casing body is made of a conductive member, the casing body can be used as a terminal on the induction electrode side.

According to a ninth aspect of the present invention, an annular wall rising along the outer peripheral shape of the ozone generating discharge unit is formed around the heat transfer plate contact surface of the casing body. The discharge unit for ozone generation can be easily arranged at the position most suitable for ozone generation in the casing, and the position of the discharge unit for ozone generation is shifted in the direction along the heat transfer plate contact surface. Can be prevented.

By the way, the ozone generating discharge unit can secure the close contact with the casing main body by its own weight only by mounting it on the casing main body. As described above, when the ozone generating discharge unit is provided with a unit fixing means for fixing the ozone generating discharge unit to the casing main body, even when the ozone generating device is used in a vibration environment or the like, the ozone generating discharge unit and the casing Adhesion with the main body can be ensured.

The specific structure of the "unit fixing means" is not particularly limited, but as described in claim 11, the surface of the ozone generating discharge unit on the discharge electrode side is elastically pressed. If this is constituted by the elastic member provided on the cover in this way, the ozone generating discharge unit can be securely fixed to the casing body with a simple structure.

In this case, in consideration of the fact that the casing is formed with a communication hole for communicating the ozone generating space in the casing with the external space, the cover is formed in the cover. At least one pair of through connectors penetrating through the space is attached, and a compression spring is attached to the tip of each of these through connectors to constitute the elastic member. It can be performed.

Alternatively, as described in claim 13,
The heat transfer plate may be made of a magnetic material, and the unit fixing means may be made of a magnet provided on the casing body. Even in such a case, the ozone generating discharge unit can be securely fixed to the casing body with a simple configuration. Further, in this case, it is possible to confirm that the ozone generating discharge unit is fixed to the casing body before the cover is attached.

[0036]

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 is a perspective view showing an ozone generating discharge unit according to an embodiment of the present invention, and FIG.
FIG. 3 is an exploded perspective view, and FIG.

As shown in FIGS. 1 and 2, the ozone generating discharge unit 10 according to the present embodiment includes an ozone generating discharge 12, a heat transfer plate 14, and a lead wire 16.

The ozone generating discharge body 12 is formed on a surface 18a of a rectangular ceramic substrate 18 (dielectric substrate).
The discharge electrode 20 and the induction electrode 22 are formed on the back surface 18b, respectively.

The discharge electrode 20 is formed in a grid-like pattern, and a lead wire joint 20a is provided at a corner thereof. Then, the surface 1 of the ceramic substrate 18
8a, the discharge electrode 20 is left except for the lead wire joint 20a.
A protective layer 24 is formed so as to cover the whole. The lead wire 16 is connected to the lead wire joint 2 of the discharge electrode 20.
0a. On the other hand, the induction electrode 22 is formed in a rectangular planar pattern substantially the same as the outer peripheral shape of the discharge electrode 20.

The ceramic substrate 18 is made of a sintered body of alumina. The discharge electrode 20 is formed of a metal-containing fired layer obtained by firing a mixture of tungsten and glass, and the induction electrode 22 is formed by firing tungsten. Further, the protective layer 24
Is constituted by firing a mixture of glass and ceramics.

The heat transfer plate 14 is made of an alumite-treated aluminum plate, and is fixed to the surface of the ozone generating discharge body 12 on the induction electrode 22 side. The heat transfer plate 14 is formed in substantially the same outer shape as the ceramic substrate 18, and the thickness of the heat transfer plate 14 is
The thickness is set to be about five times the thickness of the sheet 8.

The heat transfer plate 14 is fixed to the ozone generating discharge body 12 by bonding using a conductive adhesive 26. As the conductive adhesive 26, a material obtained by kneading a highly conductive metal powder such as silver into a base such as an epoxy resin can be used.

As shown in FIG. 3, the ozone generating discharge unit 10 connects the discharge electrode 20 and the heat transfer plate 14 to an AC power supply 28 and supplies an AC high voltage between the discharge electrode 20 and the heat transfer plate 14. Is applied, a corona discharge is generated in a space (ozone generation space) 30 above the discharge electrode 20 (a streamer of the corona discharge is indicated by a broken line in the figure), whereby the ozone is formed along the surface 18a of the ceramic substrate 18. The source gas (oxygen gas) supplied to the generation space 30 is ozonized.

FIG. 4 is an exploded perspective view showing an ozone generator 50 using the above-mentioned ozone generating discharge unit 10. FIG. 5 is a side sectional view, and FIG. 6 is a VI section of FIG. FIG.

As shown in these figures, the ozone generator 50 includes the above-described ozone generating discharge unit 10 and a casing 52 accommodating the same.

The casing 52 includes a casing main body 54 for mounting and supporting the ozone generating discharge unit 10, and a cover 56 attached to the casing main body 54. Both the casing body 54 and the cover 56 are made of aluminum, and the surfaces thereof are anodized.

On the upper surface of the casing body 54, the heat transfer plate 1
4, a rectangular heat transfer plate contact surface 54a that makes surface contact with the lower surface is formed, and an annular wall 54b rising along the outer peripheral shape of the ozone generating discharge unit 10 is formed around the heat transfer plate contact surface 54a. Are formed. On the other hand, a plurality of radiating fins 54c are formed on the lower surface of the casing body 54 so as to extend in parallel with each other, and a large number of narrow grooves 54d are formed on both side surfaces of each of the radiating fins 54c.

The attachment of the cover 56 to the casing body 54 is performed using a plurality of bolts 68. That is, the annular wall 54 of the casing body 54
b, a plurality of bolt holes 54e are formed, and a plurality of bolt insertion holes 56b are formed in a peripheral portion 56a of the cover 56.
The bolt 68 is inserted into the bolt insertion hole 56b and tightened in the bolt hole 54e in a state where the peripheral edge portion 56a is in contact with the upper surface of the annular wall 54b, whereby the mounting is performed. It has become.

On the lower surface of the cover 56, a rectangular concave portion 56c is formed having substantially the same outer shape as the heat transfer plate contact surface 54a, and the ozone generating space 30 is formed above the ozone generating discharge unit 10. It is supposed to. Also,
On the lower surface of the cover 56, an annular groove 56d is formed so as to surround the rectangular recess 56c at substantially equal intervals on the entire circumference. A gasket 58 made of an ozone-resistant elastic material (for example, silicone resin or the like) is attached to the annular groove 56d, so that the space 30 for ozone generation when the cover 56 is attached to the casing body 54 and the outside are formed. It is designed to ensure a sealing property with the space.

In the upper portion of the cover 56 above the center of both ends in the longitudinal direction of the discharge unit 10 for generating ozone,
A pair of screw holes 56e penetrating the cover 56 in the vertical direction
The through connector 60 is screwed and fixed to each of the screw holes 56e.

Each of these penetrating connectors 60 is an L-shaped cylindrical member made of a heat-resistant resin having ozone resistance (for example, polytetrafluoroethylene (trade name “Teflon”) or the like).
A communication hole 60a for communicating the ozone generation space 30 with the external space is formed therein. Also,
On the outer peripheral surface of both ends of each through connector 60, a screw portion 60b to be screwed into the screw hole 56e of the cover 56 and a screw portion 60c to be screwed to the nut 62 are formed. Furthermore, the screw portion 60b in each through connector 60
A spring locking portion 60d for locking the upper end of the compression coil spring 64 is formed at the tip of the spring.

When the cover 56 is attached to the casing main body 54, the lower end of the compression coil spring 64 has a longitudinal end (discharge electrode 20 side) on the upper surface (discharge electrode 20 side) of the ozone generating discharge unit 10. (A position deviated from the position), and elastically presses the ozone generating discharge unit 10, thereby fixing the ozone generating discharge unit 10 to the casing body 54. .

Screw part 60c in each through connector 60
Is formed in a tapered shape, and a raw gas supply pipe and an ozone gas delivery pipe (not shown) are connected to the front end. The seal at each of these pipe connection portions is secured by screwing the nut 62 to the screw portion 60c.

A screw hole 56f penetrating the cover 56 in the horizontal direction is formed at one longitudinal end of the ozone generating discharge unit 10 at a peripheral edge 56a of the cover 56, and a lead is formed in the screw hole 56f. Wire insertion plug 66
Are fixed with screws. This lead wire insertion plug 6
Reference numeral 0 also denotes a heat-resistant resin member having ozone resistance, and a lead wire insertion hole 6 through which the lead wire 16 is inserted.
6a are formed. On the outer peripheral surface of both ends of the lead wire insertion plug 60, a screw portion 66b to be screwed into the screw hole 56f of the cover 56 and a screw portion 66c to be screwed to the nut 68 are formed. Lead wire insertion plug 6
6 has a tapered tip portion, and a lead wire cover tube (not shown) is attached to the tip portion, and a nut 68 is screwed into the screw portion 66c. Insertion plug 66
The sealing property between them is ensured.

At the four corners on the upper surface of the cover 56, the casing 5 is provided in accordance with the use environment of the ozone generator 50.
A screw hole 56g is formed for allowing the other 2 to be attached to another structure.

In the ozone generator 50 according to the present embodiment, a raw material gas is supplied from one of the through connectors 60 to the ozone generating space 30 in the casing 52 and flows along the ozone generating discharge unit 10. After letting
The ozone gas generated in the ozone generating space 30 is sent from the other through connector 60 to the outer space of the casing 52.

As described in detail above, in the present embodiment, the ozone generating discharge unit 10 is constituted by fixing the heat transfer plate 14 to the surface of the ozone generating discharge 12 on the induction electrode 20 side. This ozone generating discharge unit 1
Since the ozone generator 50 is configured using 0, the following operation and effect can be obtained.

That is, the heat transfer plate 14 of the ozone generating discharger 12 is made of an aluminum plate having a significantly higher thermal conductivity than a ceramic substrate 18 made of alumina. 18, the heat of the ozone generating discharger 12 is quickly transferred to the heat transfer plate 14.
And the ozone generating discharger 1
2 can be prevented from being deformed by heat.

In the ozone generator 50, the ozone generating discharge unit 10 is supported by the aluminum casing 52 so that the heat transfer plate 14 is in surface contact with the aluminum casing 52. The heat of the discharge body 12 can be released to the casing 52 via the heat transfer plate 14. At this time, since the heat transfer plate 14 made of aluminum can easily ensure the smoothness of its surface, the heat transfer plate 1
4 and the casing 52 can be sufficiently secured, so that heat can be smoothly transferred from the ozone generating discharge body 12 to the casing 52. Moreover, the weight of the ozone generating discharge unit 10 is larger (several times as large) by the heat transfer plate 14 than that of the ozone generating discharge unit 12 alone. Adhesion with the casing 52 can also be improved.

Further, the ozone generating discharge unit 10
Is detachably supported by the casing 52, so that when the ozone generating discharger 12 needs to be replaced, the ozone generating discharger unit
2 and only the ozone generating discharge unit 10 can be replaced.

Therefore, according to the present embodiment, it is not necessary to replace the casing 52 at the time of replacing the ozone generating discharger 12, and it is possible to effectively suppress a decrease in ozone generation efficiency.

In particular, the ozone generating discharge unit 1
Numeral 0 indicates that the heat transfer plate 14 is fixed to the ozone generating discharge body 12, but since this heat transfer plate 14 is extremely inexpensive compared to the casing 52, it is necessary to replace the casing simultaneously as in the conventional case. In this case, the maintenance cost of the ozone generator can be significantly reduced as compared with the case described above.

In the present embodiment, since the heat transfer plate 14 is formed to have substantially the same outer shape as the ceramic substrate 18, the effects provided by the heat transfer plate 14 (ie, the heat radiation effect and the bending deformation preventing effect) are obtained. After securing enough,
The ozone generating discharge unit 10 can be made compact.

Further, in the present embodiment, the casing 52 is provided with a heat transfer plate contact surface 5 capable of making surface contact with the heat transfer plate 14.
4a and a cover 56 attached to the casing body 54 by bolting, so that the ozone generating discharge element can be easily operated by simply opening and closing the cover 56 by attaching and detaching the bolt 68. Unit 1
An exchange of zeros can be made.

Further, since a plurality of radiating fins 54c are formed on the lower surface of the casing main body 54, the heat transmitted to the casing main body 54 can be efficiently radiated to the external space. Moreover, each radiating fin 54c
Since a plurality of narrow grooves 54d are formed on both side surfaces of
Thereby, the surface area of the radiation fin 54c can be increased, and the heat radiation can be enhanced.

In this embodiment, the heat conductive plate 14 made of aluminum and having excellent conductivity is fixed to the ozone generating discharge body 12 by bonding using a conductive adhesive 26, and Since the casing body 54 is also made of aluminum, the casing body 54 can be used as a terminal on the induction electrode 22 side.

Further, an annular wall 54b is formed around the heat transfer plate contact surface 54a of the casing body 54 so as to rise along the outer peripheral shape of the ozone generating discharge unit 10, so that the ozone generating discharge unit is formed. 10 can be easily arranged at the position most suitable for ozone generation in the casing 52, and the position of the ozone generation discharge unit 10 is shifted in the direction along the heat transfer plate contact surface 54a. Can be prevented.

In this embodiment, the surface of the ozone generating discharge unit 10 on the side of the discharge electrode 14 is configured to be elastically pressed by the compression coil spring 64. 10 can be securely fixed to the casing body 54. In addition, due to the elastic pressing force and the weight of the ozone generating discharge unit 10, the adhesion between the ozone generating discharge unit 10 and the casing body 54 can be sufficiently increased. Therefore, even when the ozone generator 50 is used in a vibrating environment or the like, it is possible to maintain the close contact between the ozone generating discharge unit 10 and the casing main body 54 and effectively suppress a decrease in ozone generation efficiency. it can.

The compression coil spring 64 is provided with a pair of through connectors 6 which are inserted through the cover 56 for gas supply and exhaust.
Since the ozone generating discharge unit 10 is attached to the front end of the casing body 54, the ozone generating discharge unit 10 can be tightly fixed to the casing body 54 with a very simple and inexpensive configuration. Since the through connector 60 is made of resin having excellent electrical insulation properties,
Even when the compression coil spring 64 is made of a metal material such as stainless steel, the insulation between the aluminum cover 56 and the compression coil spring 64 can be maintained, and thereby the corona discharge in the ozone generating space 30 can be maintained. The possibility of adversely affecting the operation can be avoided.

In the present embodiment, the heat transfer plate 14 of the ozone generating discharge body 12 and the casing body 54 and the cover 56 of the casing 52 are all made of aluminum. Other single metal materials or alloy materials, or ceramic materials such as aluminum nitride and silicon carbide may be used as long as they are made of a material having a higher thermal conductivity. When the casing body 54 is made of a non-conductive material, the heat transfer plate 14 may be used as a terminal on the induction electrode 22 side, and the heat transfer plate 14 is made of a non-conductive material. In this case, the terminal on the induction electrode 22 side may be formed in the ozone generating discharge unit 10 itself. Specifically, for example, when bonding the heat transfer plate 14 to the ozone generating discharge body 12,
The terminal piece may be sandwiched between the ozone generating discharge body 12 so as to be in contact with the induction electrode 22.

As in the present embodiment, the compression coil spring 64
7, the cover 56 is formed of a non-conductive ceramic material or the like, and the rectangular recess 5 of the cover 56 is formed as shown in FIG.
6c, a spring mounting portion 56h is formed.
The upper end of the compression coil spring 64 may be press-fitted to h. Also in this case, the same operation and effect as in the present embodiment can be obtained. In this case, it is of course possible to use a leaf spring or the like instead of the compression coil spring 64. Since the cover 56 is not a member that comes into direct contact with the ozone generating discharge unit 10, it is not necessary that the ceramic material constituting the cover 56 has a high thermal conductivity.
If the cover 6 is made of a high thermal conductive ceramic material such as aluminum nitride or silicon carbide, the cover 56 can be used as a heat radiating member.

Alternatively, instead of attaching the compression coil spring 64 to the distal end of the through connector 60 as in this embodiment, as shown in FIG. 8, the magnet mounting recess 54f is formed in the heat transfer plate contact surface 54a of the casing body 54. And a magnet 70 is bonded and fixed to the magnet mounting recess 54f, and the ozone generating discharge unit 10 is attached to the casing body 54 by the attraction force of the magnet 70.
It is also possible to fix to. In this case, the heat transfer plate 14 of the ozone generating discharge body 12 needs to be made of a magnetic material and have higher thermal conductivity than the ceramic substrate 18 made of alumina. For example, a steel plate that has been subjected to an antioxidation treatment such as plating or the like may be used.

Also in this case, the same operation and effect as in the present embodiment can be obtained. Further, in this case, the ozone generating discharge unit 10 is connected to the casing body 54 before the cover 56 is attached.
Can be confirmed that it was fixed to.

The magnet 70 is connected to one of the heat transfer plate contact surfaces 54a.
The ozone generating discharge unit 10 can be fixed more reliably at a plurality of locations. The magnet 7
0, if the upper end surface is provided so as not to protrude above the heat transfer plate contact surface 54a, it is possible to prevent the adhesion between the ozone generation discharge unit 10 and the casing body 54 from being impaired. Can be.

[Brief description of the drawings]

FIG. 1 is a perspective view showing an ozone generating discharge unit according to an embodiment of the present invention.

FIG. 2 is an exploded perspective view showing the ozone generating discharge unit.

FIG. 3 is a sectional side view showing a main part of the discharge unit for generating ozone.

FIG. 4 is an exploded perspective view showing an ozone generator using the ozone generating discharge unit.

FIG. 5 is a sectional side view showing the ozone generator.

FIG. 6 is a detailed view of a VI section in FIG.

FIG. 7 is a view similar to FIG. 6, showing a modification of the embodiment.

FIG. 8 is a view similar to FIG. 6, showing another modification of the embodiment.

FIG. 9 is a sectional side view of a main part showing a conventional example.

FIG. 10 is a sectional view of a main part showing another conventional example (a) and a detailed view of a part b thereof (b).

[Explanation of symbols]

REFERENCE SIGNS LIST 10 Ozone generation discharge unit 12 Ozone generation discharge unit 14 Heat transfer plate 16 Lead wire 18 Ceramic substrate (dielectric substrate) 18a Front surface 18b Back surface 20 Discharge electrode 20a Lead wire joint 22 Induction electrode 24 Protective layer 26 Conductive bonding Agent 28 AC power supply 30 Ozone generating space 50 Ozone generating device 52 Casing 54 Casing main body 54a Heat transfer plate contact surface 54b Annular wall 54c Radiation fin 54d Narrow groove 54e Bolt hole 54f Magnet mounting concave portion 56 Cover 56b Bolt insertion hole 56c Square Shape recess 56d Annular groove 56e, 56f, 56g Screw hole 56h Spring mounting part 58 Gasket 60 Penetrating connector 60a Communication hole 60b, 60c Screw part 60d Spring locking part 62 Nut 64 Compression coil spring (compression spring) (elastic member) (unit fixing) Stage) 66 lead wire insertion plug 66a lead wire insertion hole 66b, 66c threaded portion 68 bolt 70 Magnet

Claims (13)

[Claims] 1. An ozone generating discharge body having a discharge electrode and an induction electrode attached to both surfaces of a dielectric substrate, and the dielectric body fixed to a surface of the ozone generation discharge body on the induction electrode side. A discharge unit for generating ozone, comprising: a heat transfer plate having a higher thermal conductivity than a substrate. 2. The ozone generating discharge unit according to claim 1, wherein the thickness of the heat transfer plate is set to a value larger than the thickness of the dielectric substrate. 3. The heat transfer plate according to claim 1, wherein said heat transfer plate is formed in substantially the same outer shape as said dielectric substrate.
Or the ozone generating discharge unit according to 2. 4. The heat transfer plate according to claim 1, wherein the heat transfer plate is formed of a conductive member, and the fixing is performed by bonding using a conductive adhesive. Discharge unit for ozone generation. 5. An ozone generating apparatus comprising: the ozone generating discharge unit according to claim 1; and a casing accommodating the ozone generating discharge unit. The body unit is detachably supported by the casing such that the heat transfer plate comes into surface contact with the casing. 6. The casing includes a casing main body having a heat transfer plate contact surface capable of making surface contact with the heat transfer plate, and a cover attached to the casing main body.
The ozone generator according to claim 5, characterized in that: 7. The ozone generator according to claim 6, wherein a plurality of radiation fins are formed on an outer surface of said casing body. 8. The ozone generator according to claim 5, wherein said casing body is formed of a conductive member. 9. An annular wall rising along the outer peripheral shape of the ozone generating discharge unit around the heat transfer plate contact surface of the casing body. The ozone generator according to any one of the above. 10. The ozone generator according to claim 6, further comprising unit fixing means for fixing said ozone generating discharge unit to said casing body. 11. The unit fixing means, comprising: an elastic member provided on the cover so as to elastically press a surface on the discharge electrode side of the ozone generating discharge unit. Item 10. An ozone generator according to Item 10. 12. The cover is provided with at least one pair of through connectors penetrating the cover such that the ozone generating space in the casing communicates with the external space in the casing. 2. A compression spring comprising a compression spring attached to a distal end of a through connector.
2. The ozone generator according to 1. 13. The ozone generator according to claim 10, wherein said heat transfer plate is made of a magnetic material, and said unit fixing means is made of a magnet provided on said casing body.